Last night, Leah Remini did something that almost seems impossible in the second season of her critically-acclaimed docuseries — she dove into yet another minimally discussed faction of Scientology. Welcome to the world of Narconon.

Narconon is a substance abuse treatment facility that relies on the tenants of Scientology and is backed by the Church of Scientology. But, as noted Scientology journalist Tony Ortega puts it, the facility is primarily a front for conversion. “Scientology advertises that they’re going to give you individualized drug counseling. And they’re very careful never to tell you that you won’t be talking about drugs at all. You’re just getting Scientology training,” Ortega said in an interview on the show.

The facility’s treatment is largely composed of a 25-day sauna program. However, if people who go through this program have certain preexisting health issues, it can result in discomfort, health problems, or even death. There have been multiple deaths over the years that have been linked to Narconon facilities.

“Then go into this 25-day sauna program where they’re being baked, you know, four or five hours a day. Well, these parents, before sending their loved ones to Narconon should be checking it out before putting them into a risky situation,” Ortega said. “It’s risky, it’s bad, and several people have died.”

Despite these alleged hazards, Narconon still boasts a 91 percent success rate, a number that the facilities’ own lawyers have said is untrue, Scientology and the Aftermath claims. It’s an odd and fascinating episode of a fascinating series. However, you would be forgiven for missing this particular installment. “Propaganda Arms,” the twelfth episode in Season 2, premiered to little to no fanfare or promotion after Scientology and the Aftermath‘s conclusion last Tuesday. Not only that, but the episode premiered on a Sunday night, a break from the show’s typical Tuesday premiere. This Tuesday another new episode of the series, titled “The Life and Lies of L. Ron Hubbard,” is also set to air after this season’s finale.

New episodes of Leah Remini: Scientology and the Aftermath premiere on Tuesdays at 10 p.m. on A+E.